auxiliary floor area

例句：

1. 1. The auxiliary power unit is responsible for providing backup power during emergencies.
   辅助动力单元负责在紧急情况下提供备用电源。
2. 2. The auxiliary light in the kitchen helps to illuminate the area.
   厨房里的辅助灯光帮助照亮区域。
3. 3. The auxiliary generator is used to provide power when the main generator fails.
   当主发电机失败时，辅助发电机被用来提供电力。